Vehicle outer covering part forming die

Abstract

The utility model relates to a vehicle outer covering part forming die which comprises a drawing male die, a movable male die and a driving mechanism, the movable male die is arranged in the drawing male die in a vertically movable mode and has an extending position and a retracting position, at the extending position, the movable male die extends out of the upper surface of the drawing male die, and the extending height is not lower than a characteristic ridge line; at the retraction position, the movable male die and the drawing male die form a complete pressing face, the driving mechanism is used for driving the movable male die to move, and the driving mechanism and the movable male die are elastically connected. According to the vehicle outer covering part forming die provided by the invention, the movable male die is constructed as a part of the lower die, so that the movable male die is not limited by a supplementary process surface any more, and even if the supplementary process surface is far away from a characteristic ridge line, the movable male die can play a role in protecting the characteristic ridge line; the vehicle outer covering part forming die can achieve the purpose of controlling slippage in the whole forming process including the drawing initial stage and the drawing downward stage.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle manufacturing, and in particular, to a vehicle outer covering molding die. Background Art

[0002] Slip lines are a common surface defect of automobile exterior panels during stamping production. The appearance of slip lines seriously affects the surface quality and product appearance of stamped parts. Adjusting the shape of the process supplementary surface is a more conventional way to control the slip of exterior panels. Specifically, a fixed protrusion structure is set on the supplementary process surface to protect the characteristic edge line. However, the defect of this method of controlling the slip line is that the setting of the protrusion is limited by the process supplementary surface, and if the slip line is located inside the product, for example, the corner above the side sliding door, the characteristic edge line cannot be protected due to its distance from the characteristic edge line, and thus the slip defect cannot be solved. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a vehicle outer cover forming die.

[0004] According to an embodiment of the present disclosure, there is provided a vehicle outer cover forming die, comprising:

[0005] Drawing punch;

[0006] A movable punch is movably arranged in the drawing punch up and down, and has an extended position and a retracted position, wherein: in the extended position, the movable punch extends out of the upper surface of the drawing punch, and the extended height is not lower than the characteristic ridge line; in the retracted position, the movable punch and the drawing punch form a complete pressing surface;

[0007] The driving mechanism is used to drive the movable punch to move, and the driving mechanism and the movable punch are elastically connected.

[0008] Optionally, the vehicle outer cover forming die further includes an upper limit structure for limiting an upward stroke of the movable punch and a lower limit structure for limiting a downward stroke of the movable punch.

[0009] Optionally, the upper stop structure includes a stop portion provided on the movable punch, and the stop portion is configured to abut against the top inner wall surface of the drawing punch when the movable punch moves to the upper dead point position.

[0010] Optionally, the vehicle outer cover forming mold also includes a mounting plate arranged in the drawing punch and fixedly connected to the drawing punch, the driving mechanism is installed on the mounting plate, and the lower limit structure includes a stop member fixedly connected to the bottom of the movable punch, and the stop member is configured so that when the movable punch moves to the lower stop point position, the stop member abuts against the upper surface of the mounting plate.

[0011] Optionally, a guide structure is provided between the movable punch and the inner side wall of the drawing punch, so as to enable the movable punch to move up and down along a straight line.

[0012] Optionally, the driving mechanism is a nitrogen spring.

[0013] Optionally, a connecting piece is provided between the piston rod of the nitrogen spring and the bottom of the movable punch, and the connecting piece is detachably connected to the movable punch.

[0014] Optionally, the upper surface of the movable punch is configured as a profile that matches the shape of the part to be formed.

[0015] Optionally, the movable punch is configured such that the height of the circumference is greater than the height of the middle portion, and the circumference of the movable punch is chamfered toward the outer side wall.

[0016] Optionally, a side of the movable punch away from the characteristic ridgeline is provided with a chamfered surface inclined downward.

[0017] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: the vehicle outer cover forming die provided by the present disclosure includes a drawing punch and a movable punch, wherein the movable punch has an extended position extending from the surface of the drawing punch and a retracted position forming a complete pressing surface with the drawing punch. In the initial stage of drawing, the extended height of the movable punch is not lower than the characteristic ridge, thereby protecting the characteristic ridge. As the drawing progresses downward, the upper die presses the movable punch downward. Due to the gradually increasing drop between the characteristic ridge and the movable punch, the sheet metal at the characteristic ridge will flow toward the direction of the movable punch instead of sliding toward the A surface, thereby solving the problem of characteristic ridge slippage. In the vehicle outer cover forming die provided by the present disclosure, the movable punch is constructed as a part of the lower die, so that it is no longer limited by the supplementary process surface. In this way, even if the supplementary process surface is far away from the characteristic ridge, the movable punch can also play a protective role on the characteristic ridge, and the vehicle outer cover forming die provided by the present disclosure can control slippage in the entire forming process including the initial stage of drawing and the downward drawing.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present disclosure and constitute a part of the specification. They are used to explain the present disclosure together with the following detailed description, but do not constitute a limitation of the present disclosure.

[0020] Figure 1 1 is a top view of a vehicle outer cover molding die provided in accordance with an exemplary embodiment of the present disclosure.

[0021] Figure 2 yes Figure 1 Cross-sectional view of the vehicle outer cover molding mold in the AA direction.

[0022] Figure 3 yes Figure 1 Cross-sectional view of the vehicle outer cover molding mold in the BB direction.

[0023] Figure 4 1 is a perspective view of a vehicle outer panel forming die provided in an exemplary embodiment of the present disclosure, in which a drawing punch is omitted.

[0024] Figure 5 It is a schematic diagram of the state of the active punch during the drawing process.

[0025] Figure 6 It is a schematic diagram of the state of the active punch when drawing to the bottom.

[0026] Description of Reference Numerals

[0027] 1-drawing punch, 2-movable punch, 21-chamfer, 22-bevel cut surface, 3-driving mechanism, 4-upper limit structure, 41-stop part, 5-lower limit structure, 51-stop member, 6-mounting plate, 7-guide structure, 8-connecting member, 100-characteristic edge line that produces slippage, 200-upper die, 300-sheet material. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0030] like Figures 1 to 6As shown, an exemplary embodiment of the present disclosure provides a vehicle outer cover forming die for solving the problem of slippage of the outer cover's appearance fillet, and is particularly suitable for outer covers with slip lines inside the product, where the process supplementary surface is often far away from the characteristic edge line. For example, when measuring the corner above the sliding door, since the sliding door's seam extends toward the top cover, the appearance fillet at the door opening corner is prone to slippage and the paint is visible.

[0031] Specifically, the vehicle outer cover forming die provided by the present disclosure includes a drawing punch 1, a movable punch 2 and a driving mechanism 3. The movable punch 2 can be movably arranged up and down in the drawing punch 1, and has an extended position and a retracted position, wherein: in the extended position, the movable punch 2 extends out of the upper surface of the drawing punch 1, and the extended height is not lower than the characteristic ridge line; in the retracted position, the movable punch 2 and the drawing punch 1 form a complete pressing surface. The driving mechanism 3 is used to drive the movable punch 2 to move, and the driving mechanism 3 and the movable punch 2 are elastically connected in the middle. The up and down here refers to the up and down directions under the normal working state of the mold.

[0032] The drawing punch 1 of the present disclosure belongs to the lower die. During the forming process, the upper die 200 moves in the direction of the lower die and presses the sheet 300 located between the upper die 200 and the lower die. The upper die 200 and the lower die are constructed with specific profiles, so that the sheet 300 can be formed into a characteristic shape after pressing. The movable punch 2 is constructed as a part of the lower die, that is, the movable punch 2 and the drawing punch 1 together form the lower die, which is mainly reflected in that when the movable punch 2 is in the retracted position, the movable punch 2 and the drawing punch 1 form a complete pressing surface, and the pressing surface here is the profile of the lower die.

[0033] The movable punch 2 is arranged in the drawing punch 1 and can move up and down to have an extended position and a retracted position. In the extended position, the movable punch 2 extends from the upper surface of the drawing punch 1, and the extended height is not lower than the characteristic edge line. The generation of the slip line is mainly due to the undesirable traces caused by the sheet material 300 passing over the characteristic edge line. Therefore, if the strength of the contact between the sheet material 300 and the characteristic edge line can be reduced, the generation of the slip line can be avoided as much as possible.

[0034] For details, please refer to Figure 5 At the beginning of drawing, the dotted circle is the location of the characteristic edge line. When the movable punch 2 extends to a position higher than the characteristic edge line, Figure 5 The two parallel dotted lines in the middle are the height differences. At this time, the sheet 300 is mainly in contact with the movable punch 2, thereby avoiding the contact between the sheet 300 and the characteristic edge line. Even if the sheet 300 inevitably contacts the characteristic edge line, its strength is greatly weakened, that is, the sheet 300 can easily pass over the characteristic edge line, thereby avoiding the generation of slip lines.

[0035] As the stretching goes down, please refer to Figure 6 Due to the elastic connection between the movable punch 2 and the driving mechanism 3, as the upper die 200 continues to move downward and presses the movable punch 2 downward, the characteristic edge line on the drawing punch 1 gradually appears. However, due to the gradually increasing gap between the characteristic edge line and the movable punch 2, the sheet material 300 needs to be replenished. Therefore, the sheet material 300 at the characteristic edge line will flow toward the movable punch 2 instead of sliding toward the A surface, thereby avoiding the generation of slip lines.

[0036] The vehicle outer cover provided by the present disclosure constructs the movable punch 2 as a part of the lower die, which is different from the method of setting a fixed protruding structure behind the process supplement in the related art. However, this method of the related art is obviously limited by the process supplement surface. If the distance between the characteristic edge and the process supplement surface is far, the protruding structure obviously cannot effectively protect the characteristic edge. Considering that the characteristic edge is often formed by the rounded corners that rise upward from the drawing punch 1, the present disclosure constructs the movable punch 2 used to protect the characteristic edge as a part of the lower die, which is closer to the characteristic edge in position, so it is not limited by the position of the process supplement surface, and the protection of the characteristic edge is more effective.

[0037] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the vehicle outer cover forming die provided by the present disclosure includes a drawing punch 1 and a movable punch 2, wherein the movable punch 2 has an extended position extending from the surface of the drawing punch 1 and a retracted position forming a complete pressing surface with the drawing punch. In the early stage of drawing, the extended height of the movable punch 2 is not lower than the characteristic edge line, thereby protecting the characteristic edge line. As the drawing progresses downward, the upper die 200 presses the movable punch 2 downward. Due to the gradually increasing drop between the characteristic edge line and the movable punch 2, the sheet 300 at the characteristic edge line will flow toward the direction of the movable punch 2 instead of sliding toward the A surface, thereby solving the problem of characteristic edge line slippage. In the vehicle exterior cover forming mold provided in the present invention, the movable punch 2 is constructed as a part of the lower mold, so that it is no longer limited by the supplementary process surface. In this way, even if the supplementary process surface is far away from the characteristic edge line, the movable punch 2 can also play a protective role for the characteristic edge line. The vehicle exterior cover forming mold provided in the present invention can control slippage in the entire forming process including the initial stage of drawing and the downward stage of drawing.

[0038] Can also refer to Figures 2 to 4 The vehicle outer cover molding die provided by the present disclosure also includes an upper limit structure 4 for limiting the upward stroke of the movable punch 2 and a lower limit structure 5 for limiting the downward stroke of the movable punch 2. By limiting the upward stroke of the movable punch 2, the upper dead point of the movable punch 2 can be set to a height not lower than the characteristic ridgeline, and at the same time, it can also avoid damaging the sheet 300 due to excessive extension height. By limiting the downward stroke of the movable punch 2, the lower dead point of the movable punch 2 can be set to a position where a complete pressing surface can be formed with the drawing punch 1.

[0039] In some embodiments, the upper limit structure 4 includes a stopper 41 disposed on the movable punch 2, and the stopper 41 is configured to abut against the top inner wall surface of the drawing punch 1 when the movable punch 2 moves to the upper stop position. The stopper 41 can be integrally formed on the movable punch 2, for example, the stopper 41 can be configured in the shape of a hanging platform, the stopper 41 can directly abut against the top inner wall surface of the drawing punch 1, or a stopper structure such as a rod or a groove that cooperates with the stopper 41 can also be provided in the drawing punch 1, which will not be described in detail here.

[0040] In other embodiments, the vehicle outer cover forming die disclosed in the present invention further includes a mounting plate 6 disposed in the drawing punch 1 and fixedly connected to the drawing punch 1, the driving mechanism 3 is mounted on the mounting plate 6, and the lower limit structure 5 includes a stopper 51 fixedly connected to the bottom of the movable punch 2, and the stopper 51 is configured so that when the movable punch 2 moves to the lower dead point position, the stopper 51 abuts against the upper surface of the mounting plate 6. The drawing punch 1 is mounted on the lower table of the press, the driving mechanism 3 is mounted on the mounting plate 6 by screws, and the mounting plate 6 is further mounted on the drawing punch 1 by screws, and the three are always fixed, and only the driving mechanism 3 drives the movable punch 2 to move up and down. The stopper 51 can be, for example, a solid block, which can move up and down with the movable punch 2, and at the lower dead point, the solid block abuts against the mounting plate 6 and prevents the movable punch 2 from continuing to move downward.

[0041] A guide structure 7 is provided between the inner side wall of the movable punch 2 and the drawing punch 1, for making the movable punch 2 move up and down along a straight line to ensure that the moving track of the movable punch 2 does not deviate. Figure 2 and Figure 4 As shown, the guide structure 7 can be a guide plate arranged on the side wall of the movable punch 2, and a plurality of guide plates can be arranged, and guide plates are arranged on the four side walls of the movable punch 2. In some other embodiments, the guide structure can also be in the form of a guide sleeve and a guide rod, and the guide sleeve and the guide rod are respectively arranged on the inner wall of the drawing punch 1 and the movable punch 2. Other forms of guide structures, as long as they can realize the structure of making the movable punch 2 move up and down along the straight line direction, can be applied to the present disclosure, and no further description is given.

[0042] The driving mechanism 3 of the vehicle outer cover forming mold provided by the present invention can adopt a nitrogen spring. The nitrogen spring is an elastic component that uses high-pressure nitrogen as the working medium, and has the advantages of small size, large elastic force, long stroke, and stable operation. Generally, the nitrogen spring is in a compressed state. When the mold is opened, the nitrogen spring releases the stroke and pushes the movable punch 2 upward. During the drawing process, the upper mold is pressed downward, and the nitrogen spring is compressed through the movable punch 2, thereby realizing the up and down movement of the movable punch 2.

[0043] A connecting piece 8 may be further provided between the piston rod of the nitrogen spring and the bottom of the movable punch 2. The connecting piece 8 may be, for example, a connecting plate, and the connecting piece 8 is detachably connected to the movable punch 2. Since the nitrogen spring has an impact on the movable punch 2, in order to ensure the life of the mold, the connecting piece 8 is installed on the movable punch 2. If the connecting piece 8 is deformed during long-term production, only the connecting piece 8 needs to be replaced.

[0044] According to the embodiment provided by the present disclosure, the upper surface of the movable punch 2 is constructed as a profile that matches the shape of the product to be formed. That is, the movable punch 2 can be a profile cut from the product, and its profile trend is determined by the product. Among them, the movable punch 2 area is marked on the product stop surface next to the sliding fillet. The shape of the movable punch 2 should be as consistent as possible with the trend of the adjacent appearance surface, but it is necessary to ensure that the shape when drawn to the bottom is as close as possible to the product shape.

[0045] The movable punch 2 can be configured such that the height of the circumference is greater than the height of the middle part, and the circumference of the movable punch 2 is formed with a chamfer 21 in the direction of the outer side wall. The chamfer can be a fillet of R3 to R5. This shape is conducive to preventing the movable punch from damaging the sheet 300. In addition, if the profile has an upward tendency, the side of the movable punch 2 away from the characteristic ridgeline can be provided with a chamfer 22 inclined downward.

[0046] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0048] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle outer cover forming die, characterized in that: include: Drawing punch; A movable punch is movably arranged in the drawing punch up and down, and has an extended position and a retracted position, wherein: in the extended position, the movable punch extends out of the upper surface of the drawing punch, and the extended height is not lower than the characteristic ridge line; in the retracted position, the movable punch and the drawing punch form a complete pressing surface; The driving mechanism is used to drive the movable punch to move, and the driving mechanism and the movable punch are elastically connected.

2. The vehicle outer cover molding die according to claim 1, characterized in that: It also includes an upper limit structure for limiting the upward stroke of the movable punch and a lower limit structure for limiting the downward stroke of the movable punch.

3. The vehicle outer cover molding die according to claim 2, characterized in that: The upper limit structure includes a stopper provided on the movable punch, and the stopper is configured to abut against the top inner wall surface of the drawing punch when the movable punch moves to the upper dead point position.

4. The vehicle outer cover molding die according to claim 2, characterized in that: It also includes a mounting plate arranged in the drawing punch and fixedly connected to the drawing punch, the driving mechanism is mounted on the mounting plate, the lower limit structure includes a stopper fixedly connected to the bottom of the movable punch, and the stopper is configured so that when the movable punch moves to the lower stop point position, the stopper abuts against the upper surface of the mounting plate.

5. The vehicle outer cover molding die according to claim 1, characterized in that: A guide structure is arranged between the movable punch and the inner side wall of the drawing punch, so as to enable the movable punch to move up and down along a straight line.

6. The vehicle outer cover molding die according to claim 1, characterized in that: The driving mechanism is a nitrogen spring.

7. The vehicle outer cover molding die according to claim 6, characterized in that: A connecting piece is provided between the piston rod of the nitrogen spring and the bottom of the movable punch, and the connecting piece is detachably connected to the movable punch.

8. The vehicle outer cover molding die according to claim 1, characterized in that: The upper surface of the movable punch is configured as a profile that matches the shape of the workpiece to be formed.

9. The vehicle outer cover molding die according to claim 8, characterized in that: The movable punch is configured such that the height of the circumference is greater than the height of the middle part, and the circumference of the movable punch is chamfered toward the outer side wall.

10. The vehicle outer cover molding die according to claim 9, characterized in that: A chamfered surface inclined downward is arranged on one side of the movable punch away from the characteristic ridge line.

Images